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, Illinois

Mobile codes:

To call a mobile phone in United States from Switzerland use the following dialing code format: 00 + 1 + The Number Click here to search for another mobile country code.

The Illinois, United States area code chart below gives you the necessary information for calling Illinois cities. For international dialing instructions to Illinois, United States, use our drop down boxes at the top of this page or check out our easy-to-use country code search tool.

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